LC709203F error

[soggycashew]

I have the adafruit LC709203F installed and ran the SCL to pin 7 and SDA to pin 6 of the Tiny2040 along with the 5v and ground. I'm using Micro python so on GitHub there is converted code
GITHUB LC709203F CODE.

I am receiving an error in the LC709203F library.

Traceback (most recent call last):
File "<stdin>", line 6, in <module>
File "LC709203F.py", line 78, in __init__
File "LC709203F.py", line 100, in _writeReg16
OSError: [Errno 5] EIO

Here is the example code and line 6 of the error is FuelGauge = BatteryMonitor(bus=i2c)

Code: Select all

import machine
from LC709203F import BatteryMonitor
from time import sleep

i2c = machine.I2C(1, scl=machine.Pin(1), sda=machine.Pin(7), freq=300000)
FuelGauge = BatteryMonitor(bus=i2c)
print("FuelGauge is Ready")
while True:
    battMon = FuelGauge.selfTest()
    sleep(2)

Here is line 78 of the error in LC709203F.py self._writeReg16(LC709203F_ADDRESS, LC709203F_REG_POWER, 0x0001)

Code: Select all

import time
import machine


CRC_TABLE = bytearray([
    0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15,
    0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D,
    0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65,
    0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D,
    0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5,
    0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
    0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85,
    0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD,
    0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2,
    0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
    0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2,
    0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
    0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32,
    0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A,
    0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42,
    0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
    0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C,
    0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
    0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC,
    0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
    0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C,
    0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44,
    0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C,
    0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
    0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B,
    0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63,
    0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B,
    0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13,
    0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB,
    0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
    0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB,
    0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3
])

LC709203F_ADDRESS = 0x0b
LC709203F_INIT_RSOC = 0x07
LC709203F_REG_TEMP = 0x08
LC709203F_REG_CELL_VOLT = 0x09
LC709203F_REG_APA = 0x0b
LC709203F_REG_RSOC = 0x0d
LC709203F_REG_BAT_PROF = 0x12
LC709203F_REG_POWER = 0x15
LC709203F_REG_TEMP_METH = 0x16
LC709203F_REG_CURR_DIR = 0x0A
LC709203F_REG_ITE = 0x0F


"""
     ________________________________________________________
    |Design Capacity of Battery APA(0x0B)                    |
    |--------------------------------------------------------|
    |        |  Type−01,Type−03  |     Type−06 |   Type−07   |
    |--------------------------------------------------------|
    |100 mAh |       0x08        |   0x0D     |   0x07       |
    |200 mAh |       0x0B        |   0x15     |   0x0C       |
    |500 mAh |       0x10        |   0x20     |   0x18       |
    |1000 mAh|       0x19        |   −        |   0x28       |
    |2000 mAh|       0x2D        |   −        |   0x40       |
    |3000 mAh|       0x36        |   −        |   0x4D       |
    ----------------------------------------------------------
     ________________________________________
    |Design Capacity of Battery APA(0x0B)    |
    |----------------------------------------|
    |        |   Type−04         |   Type−05 |
    |2600 mAh|   0x1A            |   0x0D    |
    ------------------------------------------
"""


class BatteryMonitor:
    def __init__(self, bus, battery_profile=0x0504, capacity=0x001A):
        self.i2c = bus
        self._writeReg16(LC709203F_ADDRESS, LC709203F_REG_POWER, 0x0001)
        self._writeReg16(LC709203F_ADDRESS, LC709203F_REG_APA, capacity)
        self._writeReg16(LC709203F_ADDRESS, LC709203F_REG_BAT_PROF, battery_profile)
        self._writeReg16(LC709203F_ADDRESS, LC709203F_INIT_RSOC, 0xAA55)
        self._writeReg16(LC709203F_ADDRESS, LC709203F_REG_TEMP_METH, 0x0000)
        self._writeReg16(LC709203F_ADDRESS, LC709203F_REG_CURR_DIR, 0x0000)
        self._writeReg16(LC709203F_ADDRESS, LC709203F_REG_TEMP, 0x0BA6)

    def _crc8(self, data):
        val = 0
        for pos in data:
            val = CRC_TABLE[val ^ pos]
        return val

    def _writeReg16(self, devAddress, regAddress, data):
        # Setup array to hold bytes to send including CRC-8
        cmd = bytearray(5)
        cmd[0] = 0x16
        cmd[1] = regAddress
        cmd[2] = (data & 0x00FF)
        cmd[3] = (data & 0xFF00) >> 8
        cmd[4] = self._crc8(cmd[:4])
        self.i2c.writeto_mem(devAddress, regAddress, cmd[3:])

    def _readReg16(self, devAddress, regAddress):
        data = int.from_bytes(self.i2c.readfrom_mem(devAddress, regAddress, 2), 'little') & 0xFFFF
        return data

    def getBatteryVoltage(self):
        data = self._readReg16(LC709203F_ADDRESS, LC709203F_REG_CELL_VOLT)
        return data/1000

    def getCurrentDirection(self):
        data = self._readReg16(LC709203F_ADDRESS, LC709203F_REG_CURR_DIR)
        if data == 0x0001:
            return "Charge"
        if data == 0xffff:
            return "Discharge"
        if data == 0:
            return "Auto"

    def getCapacity(self):
        data = self._readReg16(LC709203F_ADDRESS, LC709203F_REG_RSOC)
        return data

    def getEmpty(self):
        data = self._readReg16(LC709203F_ADDRESS, LC709203F_REG_ITE)
        return data/10

    def getVersion(self):
        data = self._readReg16(LC709203F_ADDRESS, 0x0011)
        return data

    def sleep(self):
        self._writeReg16(LC709203F_ADDRESS, LC709203F_REG_POWER, 0x0002)

    def wakeup(self):
        self._writeReg16(LC709203F_ADDRESS, LC709203F_REG_POWER, 0x0001)

    def selfTest(self):
        print("Go to sleep...")
        self.sleep()
        time.sleep(4)
        print("WakeUp...")
        self.wakeup()
        time.sleep(0.5)
        print("IC Version: ", self.getVersion())
        print("Batt. Volt: ", self.getBatteryVoltage())
        print("Batt. Residual Cap.", self.getCapacity())
        print("Batt. Empty", self.getEmpty())
        print("Direction: ", self.getCurrentDirection())
        print("Good!")
        [Code/]

[pythoncoder]

The error means that the device cannot be detected. Unless I'm missing something the reason seems evident. Contrast:

I have the adafruit LC709203F installed and ran the SCL to pin 7 and SDA to pin 6...

with

Code: Select all

i2c = machine.I2C(1, scl=machine.Pin(1), sda=machine.Pin(7), freq=300000)

[soggycashew]

@pythoncode I'm so sorry I didn't respond, for some reason I never get notifications.... I didn't realize that "1" was a typo..

I checked and the code example is:

Code: Select all

import machine
from LC709203F import BatteryMonitor
from time import sleep

i2c = machine.I2C(1,scl=machine.Pin(7), sda=machine.Pin(6), freq=300000)
FuelGauge = BatteryMonitor(bus=i2c)
print("FuelGauge is Ready")
while True:
    battMon = FuelGauge.selfTest()
    sleep(2)

and I get the error:

Traceback (most recent call last):
File "<stdin>", line 6, in <module>
File "LC709203F.py", line 78, in __init__
File "LC709203F.py", line 100, in _writeReg16
OSError: [Errno 5] EIO

Line 6 is:

FuelGauge = BatteryMonitor(bus=i2c)

Line 78 in LC709203F.py is:

self._writeReg16(LC709203F_ADDRESS, LC709203F_REG_POWER, 0x0001)

Now I wanted to see if scan I2C bus to see if it is found and the results below, now I ran script and I get no result and run again and get result? This is happening over and over every time I hit the play to run script.

>>> %Run -c $EDITOR_CONTENT
Scanning i2c bus
No i2c device !
>>> %Run -c $EDITOR_CONTENT
Scanning i2c bus
No i2c device !
>>> %Run -c $EDITOR_CONTENT
Scanning i2c bus
i2c devices found: 1
Decimal address: 11 | Hexa address: 0xb
>>>

[pythoncoder]

This looks like a hardware problem. The address is correct, but it rarely sees it. It's hard to diagnose at a distance but check lead quality and length, voltages, quality of ground connection. If you have access to a scope, look at the I2C signals. I'd normally bang on about pullups, but the Adafruit board has these.